Francium (Fr): Properties, Uses and Facts in 3D
Francium is element 87 on the periodic table, an alkali metal. At room temperature it is a solid. Open it in the 3D Periodic Table to spin its tile, see its electron shells and read its story.
Explore in 3DFrancium quick facts
| Atomic number | 87 |
|---|---|
| Symbol | Fr |
| Atomic mass | 223 |
| Category | Alkali Metal |
| Group and period | Group 1, period 7 |
| Block | s-block |
| State at room temperature | Solid |
| Electron configuration | [Rn] 7s¹ |
| Electrons per shell | 2, 8, 18, 32, 18, 8, 1 |
| Discovered | 1939, Perey |
What is francium used for?
- Fundamental physics research
- Atomic structure studies
- Scientific research only
Interesting facts about francium
- Francium is the most unstable naturally occurring element
- At any moment, less than 30 grams of francium exists naturally in Earth's crust
- Named after France by Marguerite Perey. One of the few elements discovered by a woman
Francium was discovered in 1939 by Perey in France.
Where francium sits on the periodic table
Francium is in group 1, period 7. Tap any element to open its page.
Other alkali metals
Francium questions
What is the atomic number of francium?
Francium has atomic number 87, so every francium atom has 87 protons in its nucleus. Its symbol is Fr and its atomic mass is 223.
Is francium a metal?
Francium is a metal. On the periodic table it is grouped as an alkali metal, found in group 1, period 7.
What is the electron configuration of francium?
The electron configuration of francium is [Rn] 7s¹. Its electrons sit in 7 shells: 2, 8, 18, 32, 18, 8, 1.
What is francium used for?
Francium is used for fundamental physics research, atomic structure studies and scientific research only.
Who discovered francium?
Francium was discovered in 1939 by Perey in France.
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